[Milestone] Configurable data transfer with additional protocols

[BigLep]

eta: 2023-08-30

description:
Do for data transfer what was done for content routing. It should be possible to have multiple data transfer protocols in parallel fetching blocks and graphs. This enables Kubo to take advantage of innovations that have been happening the last ~6 months with "Move The Bytes WG", and also leverage Kubo's distribution position for testing improvements in the wild. Completing this requires Kubo to add/support at least 1 HTTP-based data transfer protocol with support for ≥ 2MiB blocks.

Notes:
This is a Starmap "child" issue.

[BigLep]

This is a draft milestone in preparation for IPFS Thing 2023. It hasn't been reviewed or committed to by the maintainers yet.